from mock import AsyncMock

from lnbits import bolt11
from lnbits.settings import WALLET
from lnbits.wallets.base import PaymentResponse, PaymentStatus, StatusResponse
from lnbits.wallets.fake import FakeWallet

from .helpers import get_random_string, is_fake


# generates an invoice with FakeWallet
async def generate_mock_invoice(**x):
    invoice = await FakeWallet.create_invoice(
        FakeWallet(), amount=10, memo=f"mock invoice {get_random_string()}"
    )
    return invoice


if is_fake:
    WALLET.status = AsyncMock(
        return_value=StatusResponse(
            "",  # no error
            1000000,  # msats
        )
    )

# Note: if this line is uncommented, invoices will always be generated by FakeWallet
# WALLET.create_invoice = generate_mock_invoice

# NOTE: This mock fails since it yields the same invoice multiple
# times which makes the db throw an error due to uniqueness contraints
# on the checking ID

# # primitive event loop for generate_mock_invoice()
# def drive(c):
#     while True:
#         try:
#             c.send(None)
#         except StopIteration as e:
#             return e.value

# # finally we await it
# invoice = drive(generate_mock_invoice())

# WALLET.create_invoice = AsyncMock(
#     return_value=InvoiceResponse(
#         True,  # ok
#         invoice.checking_id,  # checking_id (i.e. payment_hash)
#         invoice.payment_request,  # payment_request
#         "",  # no error
#     )
# )


if is_fake:

    def pay_invoice_side_effect(
        payment_request: str, fee_limit_msat: int
    ) -> PaymentResponse:
        invoice = bolt11.decode(payment_request)
        return PaymentResponse(
            True,  # ok
            invoice.payment_hash,  # checking_id (i.e. payment_hash)
            0,  # fee_msat
            "",  # no error
        )

    WALLET.pay_invoice = AsyncMock(side_effect=pay_invoice_side_effect)
    WALLET.get_invoice_status = AsyncMock(
        return_value=PaymentStatus(
            True,  # paid
        )
    )
    WALLET.get_payment_status = AsyncMock(
        return_value=PaymentStatus(
            True,  # paid
        )
    )